Compressor.



APPLICATION FILED MAY l0, 1905.

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lilrhllllhrrllf) IIIIHHUUIIIIIIK fun-iran srirnsirnnr ortica. HANSMIKOREY, OF SCHNEBERG., NEAFERLIN, GERMANY, ASSIGNOR TO IHE FIRM OF W.GR-AAFF 8a COMPANY GESELLSCHAFT MIT BE- SCHRANKTER HAFTUNG, OF BERLIN,GERMANY.

COMPRESSOR.

Specification of Letters Patent.

Application led May I0, 1905. Serial No. 259,797.

T0 00M whom it mal/y 00n007'm Be it known that I, HANS MIKOREY, asubject of the German Emperor, residing at No. 13 WartburgstrasseSchneberg, near Berlin, Germany, have invented new and usefulImprovements in Compressors, of which the following is a specification.

This invention relates to a compressor which possesses acompression-chamber with flexible walls formed on a wheel-rim and underthe influence of an abutment-roller acting against the iieXibleperiphery, so that during the rotation of the wheel-rim of thecompressor a continuous pumping action takes place through thecompression-chamber.

The invention consists in the fact that the periphery of the wheel-rimof the compressor is grooved and provided with a membrane inclosing theannular compression-chamber and formed of elastic caoutchouc or thelike, the arrangement being such that an abutment-roller having only anarrow rim causes the comparatively wide membrane to bear closelyagainst the rim. Owing to the limited contact by the abutment-roller,which acts in the middle track or zone of the preferably U shaped rim,the wear and tear of the membrane will be considerably decreased, thusenabling this compressor to work with a very high rotating speed of thecompressorwheel. The latter is provided at the two hollowshaft oraxle-socket pieces with an inlet communicating with the suction end ofthe compression-chamber and with an outlet communicating with thepressure-chamber for the medium to be compressed.

A constructional form of the invention is shown in the accompanyingdrawings.

Figure l is a side elevation, shown partly in section, while Fig, 2shows in plan and partly in section the arrangement of the wheel-rim andthe abutment-roller coperating therewith.

The wheel a is mountedin the frame b by means of tubular trunnion orshaft portions u and e and'is set in rotation by a belt ordriving-pulley c, arranged on the shaft o, The rim f of the wheel a ispreferably of U "form, and the rim-cheeks or the like which I5o borderthis cavity h are covered from edge to edge by means of the membrane g,of rubber or similar elastic material. The edgesof the membrane arefastened to the rim in the same manner as the tire-cover in the knownpneumatic tires. For instance, as according to Fig. l of the drawings,each edge is provided with a collar w or the like, which is embedded inan annular groove of the rimcheek, whereupon the attachment is completedby a ring 1^. The membrane is stretched in such a manner that it tightlyspans the groove h and forms along the edges an air-tight joint orclosure for this hollow chamber. The latter encircles the rim eX- ceptat a part where a suitably-shaped metallic fitting e depresses themembrane g against the bottom of the rim-groove 7i. At this point thereis, so to say, a vtight partition between the contiguous ends of theannular hollow chamber.

A channel or passage s and t extends from each end of the hollow chamberon either side of the said partition in the form of a pipe on the wheela, and these channels or pipes s t extend to the hollow shaft portions uand o, which consequently form the suction and pressure pipe nipples.

An abutment-roller p is arranged on the frame l) of the compressor forcoacting with the membrane periphery of the wheel a. This roller p canreadily rotate in its bearings and is so rotated by the peripheralfriction during the rotation of the wheel a. It is essential for thepurpose of carrying out the invention that the abutment roller p haveonly a comparatively narrow rim. This -bears only along the middle zoneof the membrane g, as shown in Figs. 1 and 2, and firmly presses thesame against the bottom of the groove. Owing to the correspondinggrooved form of the rim f and the inward tension of the membrane g,notwithstanding the narrow zone of contact, a perfectly-tight joint atthe respective part beneath the membrane is secured, so that the hollowchamber is here divided into a rearwardly-located suctionchamber and aforward pressurechamber.

It follows that when the wheelarotates in the direction of thearrow,'Fig. 2, air is drawn continuously through nipple u andsuctionpipe s into the corresponding end of the hollow chamber h, andcompressed air is driven outwardly through pipe t and nipple o from :gheother compartment of the hollow chamroo IOS

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In order to lead the compressed medium or the compressed air from thecompressorwheel to the main supply-pipe, a stu'llinge box socket zcommunicates with the pressure-pipe nipple fu, so that said part c canrotate independently of the pipe e, which conveys the compressed Huid tothe main supply-pipe. A stuHing-box socket may also be provided on thesuction side of the compressor at uwhen the suction-pipefor conveyingthe Huid to be compressed to the wheel is o ble led to a receptaclecontaining the said uio Besides the abutment-roller p there is a secondnarrow edged abutment roller g (shown in the drawings in dotted lines)for completing the construction. More rollers are avoided, as otherwisethe useless friction and the wear and tear of the membrane would beconsiderably increased. The employment of a narrow-edged abutment-rollerproduces a very soft and comparatively frictionless working or operationof the compressor in consequence of the cooperation with the membranebearing against the groove portions of the rim.

Having now particularly described and ascertained the nature of myrsaidinvention and in what manner the same is to be per* formed, I declarethat what I claim, and wish to secure by Letters Patent, ish

1. A compressor comprising a wheel having a groove in its periphery, aflexible membrane covering said groove so as to form an annular chamber,means for closing said chamber at one point and a roller of lessthickness than the wheel engaging the membrane so as to force saidmembrane against the bottom ofthe groove.

2. A compressor comprising a wheel having a grooveon its periphery, amembrane formed o1"- rubber stretched across said groove so as'to formanannular chamber, means for holding said membrane at one pointpermanently pressed against the bottom of the chamber, an inlet-pipeentering said chamber on one side of said means, an outlet-pipe on theother side thereof and a roller of less thickness than the wheelengaging the mem brane so as to force it against the bottom of thegroove.

In testimony whereof I have signed my name to this specication in thepresence of two subscribing witnesses.

HANS MIKOREY.

Witnesses:

' WOLDEMAR HAUPT,

WILLIAM MAYNER.

